similar to: Inflection Points

How can I add a color bar to show the color scales to what is generated by image(), similar to the one in figures generated by filled.contour()? Thanks. Y. C. Tao

Dear Users, I use Sgeostat to calculate co variogram (function est.variogram with two variables). If i inverse the 2 variables in the functions, the co variogram change! Normaly it is symmetric, isn't it? Someone could me explain why, or give me an idea to calculate co variogram in a easy way... Thanks in advance Laurent ps : sorry for my english Laurent William Dubroca Centre de

Hello! I have a dataset with the following two vectors: year<-c(1967,1968,1969,1970,1971,1972,1973,1974,1975,1976,1977,1978,1979,1980,1981,1982,1983,1984,1985,1986,1987,1988,1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009)

Dear All, I have a binomial response with one continuous predictor (d) and one factor (g) (8 levels dummy-coded). glm(resp~d*g, data, family=binomial) Y=b0+b1*X1+b2*X2 ... b7*X7 how can I get the inflection point per group, e.g., P(d)=.5 I would be grateful for any help. Thanks in advance, Ren?

Is there any way to identify or infer the inflection points in a smooth spline object? I am doing a comparison of various methods of time-series analysis (polynomial regression, spline smoothing, recursive partitioning) and I am specifically interested in obtaining the julian dates associated with the inflection points inferred by the various models. Tyler e.g.

Hi, I have this non-linear function: y=115.251 - 118.69 * exp(-0.123517*x) I try to discovery the x value for the assyntoptic value of y and the x value where the behavior of curve change, the inflection point. How to make this? Is poss?ble to make this on R? Thanks Ronaldo -- O Flamengo e o Bangu terminaram o jogo em 0 x 0. Quem fez o gol? A Volkswagen -- | // | \\

Hi: I have a problem with the plural of fracancia, I got fragancium but in spanish is fragancia. I modified inflections in environment.rb Inflector.inflections do |i| i.irregular ''fragancia'', ''fragancias'' end but is ignored. The solution that I found was comment this inflection on inflections.rb #inflect.singular(/([ti])a$/i,

Yesterday, I opened a GitHub Issue<https://github.com/rails/rails/pull/7071> about moving Rails inflections to an initializer. The idea wasn''t received well, understandably, as generating a large initializer with new Rails apps is pretty unappealing. However, the core members seemed open to the discussion of alternatives continuing here. For those of you not in the know,

Dear all - I have followed the thread the reply to which was lead by Thomas Lumley about using pweibull to generate fitted survival curves for survreg models. http://tolstoy.newcastle.edu.au/R/help/04/11/7766.html Using the lung data set, data(lung) lung.wbs <- survreg( Surv(time, status)~ 1, data=lung, dist='weibull') curve(pweibull(x, scale=exp(coef(lung.wbs)),

I have a model ''xp_jurisdiction_taxes'' which rails (3) created correctly. Another model ''xp_jurisdiction_states'' has many :xp_jurisdiction_taxes. In my spec I am using a shoulda helper to test the association but get the following error. BTW, greped the whole project just in case and the string ''taxi'' exists nowhere. 1)

Hi R help, I am trying to determine how nls() generates a function based on the self-starting SSlogis and what the formula for the function would be. I've scoured the help site, and other literature to try and figure this out but I still am unsure if I am correct in what I am coming up with. ************************************************************************** dat <-

I''m using Rails (3.0.3) and have the following code in initializers/inflections.rb ActiveSupport::Inflector.inflections do |inflect| inflect.irregular(''nursery'', ''nurseries'') end From the console I''m getting: "nursery".pluralize => "nurseries" "nurseries".singularize => "nurseries" I should be

Have a look: http://dev.rubyonrails.org/ticket/10615 This is actually a singularize method bug: >> "Business".singularize => "Busines" seems that classify uses singularize internally. Rick resolved it as invalid but I cannot understand why. Rick, could you shed some light on your decision? MK --~--~---------~--~----~------------~-------~--~----~ You received

I'm sure there must be various peak-finding algorithms out there. Not knowing of any, I have written one myself*, but I thought I'd ask to see what's out there. Basically, I have a 2-dimensional data set and I want to identify local peaks in the data, while ignoring "trivial" peaks. My naive algorithm first identifies every peak and valley (point of inflection change

Hello, I recently updated Rails to 3.0.5. The very same code that worked on 3.0.3 now gives error. The code is: def kategorialista Kategoria.where(:elfogadva => TRUE).order("nev").collect {|s| [s.nev, s.sefuri]} end It is in application_controller.rb with helper_method :kategorialista The error it gives on 3.0.5: SQLite3::SQLException: no such table: kategoria: SELECT

Hi, I was hoping to get some advice on how to derive estimates of slopes from four parameter logistic models fit with SSfpl. I fit the model using: model<-nls(temp~SSfpl(time,a,b,c,d)) summary(model) I am interested in the values of the lower and upper asymptotes (parameters a and b), but also in the gradient of the line at the inflection point (c) which I assume tells me my rate of

Hi, As part of an application I''m developing, I''ve build a translation system (that I hope to release later) fitting my needs. However, I wondered if it would be a good idea to use inflection rules to pluralize translations. Is it possible to have inflection rules for multiple languages in parallel? I need at least french, dutch and english in the same application at the same

x = c(runif(1000, 0,2.5), runif(100, 2.5, 4)) plot(ecdf(x)) You will notice a sharp turn around x = 2.5 How do I get that value of x using R? -- Thanks, Jim. [[alternative HTML version deleted]]

Hello! So, my problem is following. I have bird offspring growth data and I'd like to model individual growth curves (aim is to study asymptotes and inflection points) with nlme according to Pinheiro & Bates 2000: first using nlsList to generate individual curves and then nlme to study the parameters and fixed effects. The data is structured to two levels. I have broods and

Hi: Im dealing with this problem: I have a irregular inflection, so I need to declare on environment.rb But is ignored by rails. rails 1.1.0 rails 1.1.1 rails 1.1.2 What can I do? Any Idea? thanks P -- Posted via http://www.ruby-forum.com/.